V4L/DVB (13635): ir-core: Implement protocol table type reading

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/IR/ir-sysfs.c

@@ -22,10 +22,36 @@ unsigned long ir_core_dev_number;
 
 static struct class *ir_input_class;
 
-static DEVICE_ATTR(ir_protocol, S_IRUGO | S_IWUSR, NULL, NULL);
+
+static ssize_t show_protocol(struct device *d,
+			     struct device_attribute *mattr, char *buf)
+{
+	char *s;
+	struct ir_input_dev *ir_dev = dev_get_drvdata(d);
+	enum ir_type ir_type = ir_dev->rc_tab.ir_type;
+
+	IR_dprintk(1, "Current protocol is %ld\n", ir_type);
+
+	/* FIXME: doesn't support multiple protocols at the same time */
+	if (ir_type == IR_TYPE_UNKNOWN)
+		s = "Unknown";
+	else if (ir_type == IR_TYPE_RC5)
+		s = "RC-5";
+	else if (ir_type == IR_TYPE_PD)
+		s = "Pulse/distance";
+	else if (ir_type == IR_TYPE_NEC)
+		s = "NEC";
+	else
+		s = "Other";
+
+	return sprintf(buf, "%s\n", s);
+}
+
+static DEVICE_ATTR(current_protocol, S_IRUGO | S_IWUSR,
+		   show_protocol, NULL);
 
 static struct attribute *ir_dev_attrs[] = {
-	&dev_attr_ir_protocol.attr,
+	&dev_attr_current_protocol.attr,
 };
 
 int ir_register_class(struct input_dev *input_dev)

include/media/ir-core.h

@@ -44,9 +44,10 @@ struct ir_scancode_table {
 struct ir_dev_props {
 	unsigned long allowed_protos;
 	void 		*priv;
-	int (*change_protocol)(void *priv, unsigned long protocol);
+	int (*change_protocol)(void *priv, enum ir_type ir_type);
 };
 
+
 struct ir_input_dev {
 	struct input_dev		*dev;		/* Input device*/
 	struct ir_scancode_table	rc_tab;		/* scan/key table */
@@ -55,6 +56,7 @@ struct ir_input_dev {
 	struct device			*class_dev;	/* virtual class dev */
 	const struct ir_dev_props	*props;		/* Device properties */
 };
+#define to_ir_input_dev(_attr) container_of(_attr, struct ir_input_dev, attr)
 
 /* Routines from ir-keytable.c */